Ice and stardust - Noctilucent clouds / Leuchtende Nachtwolken 21.6.2019
Noctilucent Clouds , Germany, Mörlenbach 21.06.2019. Noctilucent Clouds clouds are accumulations of ice crystals over the mesopause. There, the absolute temperature minimum of the earth's atmosphere is reached. They appear at a height of 81 to 85 km. They can be seen on clear nights around the summer solstice, especially in a northerly direction. The crystallization nuclei for the ice crystals may be particles that form when burning meteors.
Ice and stardust - Noctilucent clouds / Leuchtende Nachtwolken 21.6.2019
Noctilucent Clouds , Germany, Mörlenbach 21.06.2019. Noctilucent Clouds clouds are accumulations of ice crystals over the mesopause. There, the absolute temperature minimum of the earth's atmosphere is reached. They appear at a height of 81 to 85 km. They can be seen on clear nights around the summer solstice, especially in a northerly direction. The crystallization nuclei for the ice crystals may be particles that form when burning meteors.